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    <script>
        let obj = {
            name: 'zhangsan', children: [
                { name: 'zhangsanfeng' }
            ]
        };

        obj.children[0];


        // let { children: [child] } = obj
        // console.log(child);

        let { children: [{ name }] } = obj
        console.log(name);

    </script>

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